Laser-clad Inconel 625 coatings on Q245R structure steel: microstructure, wear and corrosion resistance

Wanyuan Gui; Cheng Zhong; Junyi Gu; Yuhang Ding; Xiaoming Wang; Tao Wu; Yongfeng Liang; Jingyan Qin; Yuhai Qu; Junpin Lin

doi:10.1038/s41529-022-00247-z

npj Materials Degradation (Apr 2022)

Laser-clad Inconel 625 coatings on Q245R structure steel: microstructure, wear and corrosion resistance

Wanyuan Gui,
Cheng Zhong,
Junyi Gu,
Yuhang Ding,
Xiaoming Wang,
Tao Wu,
Yongfeng Liang,
Jingyan Qin,
Yuhai Qu,
Junpin Lin

Affiliations

Wanyuan Gui: National Center for Materials Service Safety, University of Science and Technology Beijing
Cheng Zhong: National Center for Materials Service Safety, University of Science and Technology Beijing
Junyi Gu: National Center for Materials Service Safety, University of Science and Technology Beijing
Yuhang Ding: National Center for Materials Service Safety, University of Science and Technology Beijing
Xiaoming Wang: National Center for Materials Service Safety, University of Science and Technology Beijing
Tao Wu: National Center for Materials Service Safety, University of Science and Technology Beijing
Yongfeng Liang: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
Jingyan Qin: School of Mechanical Engineering, University of Science and Technology Beijing
Yuhai Qu: School of Materials Science and Engineering, Nanchang University
Junpin Lin: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing

DOI: https://doi.org/10.1038/s41529-022-00247-z
Journal volume & issue: Vol. 6, no. 1
pp. 1 – 11

Abstract

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Abstract In this work, ultra-low dilution rate Inconel 625 coatings with a thickness of ~534.4 μm were prepared by high-speed laser cladding technique on the Q245R steel. The XRD and TEM results show that the Inconel 625 coatings are mainly composed of the Nb and Mo-enriched laves phase with hexagonal close-packed (HCP) structure and the γ-Ni phase with face-centered-cubic (FCC) structure. The cellular crystal, column crystal, and equiaxed dendritic crystal were observed in the bottom, middle, and top of the Inconel 625 coatings from SEM results, respectively. The wear resistance and corrosion resistance of Q245R steel are significantly improved by high-speed laser cladding Inconel 625 coatings. In addition, the low dilution rate is beneficial for improving the wear and corrosion resistance of high-speed laser cladding Inconel 625 coatings. These findings may provide a method to design the wear and corrosion resistance of coatings on steel's surface.

Published in npj Materials Degradation

ISSN: 2397-2106 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.nature.com/npjmatdeg/

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